stone



- 2 Sheets-Sheet 1. Hi F. STONE. GRINDING MILL.

(No Model.)

Patented Oct. 12, 18 86.

Mfnease:

In Men fan- Hrberl. Stone,

N4 PETERS, Phulo-Lilhaghphnr, Washingwn, D c.

(No Model.) 2 Sheets-Sheet 2. H. F. STONE.

GRINDING MILL. No. 350,509. Patented Oct. 12, 1886.-

5 J a l I I I 5 t mfzesses':

' Harm t1. Stone,

n, PETERS, Phoko-Lilhognpher, Washington. 0, c.

.and I do hereby declare that the following is HERBERT F. STONE, OFAPPLETON, \V

ISCONSIN, ASSIGNOR TO THE APPLE TON MANUFACTURING COMPANY, OF SAMEPLACE.

GRINDIN G-MILL.

SPECIFICATION forming part of Letters Patent'Nof35Q509, dated October12, 1886.

Application filed February 11, ISFS.

.To all whom it may concern:

Be it known that I, HERBERT F. STONE, of Appleton, in the county ofOutagamie and State of Visconsin, have invented certain new and usefulImprovements in Grinding-Mills;

a full, clear, and exact description ofthe invention, which will enableothers skilled in the art to which it pertains to make and use the same,reference being had to the accompanying drawings, and to the letters ofreference marked thereon, which form a part of this specification.

The objects of my invention are, first, asimple compact horse-power millfor the rapid grinding of grain, canes, &c.; second, economy of space inthe driving mechanism; third, an adjustable non-clogging feed; and,fourth, increase in the grinding capacity of burrs of any given size.

In the accompanying drawings like letters refer to the same parts ineach figure.

Figure 1 is a plan View of the macl1ine,showing the burrs and the gearsby which they are driven in medial horizontal section, and the upperhalf of the inclosing casing or box removed. Fig. 2 is a verticalsection of the ma chine on the line 00 m, Fig. 1. Fig. 3 is a sideelevation of the same view from the back of the vertical gear whichdrives the burrs, and Figs. 4 and 5 are detail views on an enlargedscale, Fig. 4 showing the right-hand burr, as seen in Fig. 1, and Fig.5showing a transverse section of its hub and the casing inclosing it.

X X represents the frame-work of the machine, made of wood or any othersuitable ma terial. Upon an iron girder or yoke, P, near the center ofsaid framework X, are mounted the two iron grinding disks or burrs A B,whose arbors H I are supported and have bearings in journal-boxes D D,formed upon said yoke P. The arbors H and I, upon the inner ends ofwhich are mounted said burrs A and B, are provided outside of said burrswith small bevel-gears E E, so located upon said arbors as to mesh withthe large vertical bevelgear F, mounted upon the inner end of the shaftN, which is set in bearings on frame X at right angles to arbors H andI, directly opposite to the burrs A and B. The grindingfaces of theburrs may be-formed integral with Serial No. 155,653. (No model.)

said disks A and B, as shown in the drawings, or'they may be madedistinct and afterward attached thereto. The journal-boxes D Daredisposed on each side of the small bevel-gears 5 EE, and furnish firmsteady bearings for the arbors H and I. I

J represents a metallic box or casing supported by the yoke P andinclosing the burrs A and B. The burr or disk B is provided with ahollow cylindrical hub, in, Figs. 1, 2, and 5, open at the inner end andhaving openings about its outer curved face, through which the grain,&c., 'is fed between the burrs. The burr or disk A is formed with asmall solid 6 hub, bylneans of which it is secured to arbor H, the endof which projects th rough the same to receive the worm (l, whichextends into the hollow hub m of burr B. The casing J is contractedabout said hub m, and to its inner face is secured the metallic ring (1d, which forms a partition about the inner edges of the openings intosaid hub, separating the space inclosed about the burrs from thatinclosed about the outer end ofsaid hub, and preventing the,75 grain,&c., fed into the chamber inclosed by the contracted portion of easing Jfrom being forced into the chamber about the burrs.

To regulate the distance between the grinding-faces of burrs A and B forfiner or coarser 8o grinding, the end of arbor H has a bearing in asocket formed in lever K, which is pivoted at one end to the frame Xofthe machine, and secured thereto at the other end by a handscrew, L, andan eyebolt pivoted to said frame at Z. By turning said hand-screw L inor out the burrs may be adjusted for tine or course grinding.

G is a large bevel-gear or master-wheel. mounted upon frame X in ahorizontal posi- 0 tion, so as to mesh with the small bevel-gear M,mounted upon the shaft N near its outer i end. It is left entirely openinside of the rim, to give room forthe centrally-located burrs, andbears upon and is braced and held 5 in position by the friction-wheelsa, a, b, and

c, which are mounted in castings secured to the frame X. The wheels toa' bear upon the upper face of the rim of said master-wheel, a 0 uponits under face, I) 1) upon its inner face, and c 0 upon its outer face,thereby holding said masterwheel rigidly in place and relieving the rimof strain due to the absence of a central hub and radiating arms. Tosaid master-wheel, at points diametrically opposite, are secured thesweep-bars-Y Y by means of ears or plates which raise said bars abovethe top friction-wheels, a a. Said sweepbars converge and are joined atthe ends where the horse-power is attached.

0 represents a feed-hopper provided with the regulating slide 1), whichcontrols the opening of said hopper into the passage 12, communicatingwith casing J directly above the openings in hub-m of burr B. To preventclogging in the feed-opening from said hopper, I provide the smallbifurcated agitator s, mounted upon the horizontal rod 1', to which areciprocating movement is given by the eccentric e on arbor I throughthe rockshaftf and vibrating arm 9.

The hopper 0 may be made detachable from the feed-passage n, if desired,or formed integral therewith, as shown in the drawings.

The casing J, inclosing the burrs, is provided underneath the same witha delivery spout, 2', Figs. 2 and 3, for discharging the feed or productof said grinding-burrs.

\Vhen it is desired to use the machine for grinding canes or corn in theear, I attach knives h h to the arms of hub m, as shown in Figs. 4 and5. These knives may be straight or spiral, and attached to said hubparallel with its axis,or diagonally thereto, as desired.

My improved machine operates as follows: Suitable power having beenattached to the sweep-bars Y Y, tl1e'mastcr-wheelG- is turned in thedirection indicated by the arrows, thereby rotating with acceleratedspeed the vertical driving-gear F through the small gear M, as indicatedby arrows in Figs. 1 and 3. The large gear F, meshing with the smallgears E E on arbors H and I, drives the burrs mounted thereon with stillgreater speed and in opposite directions, as indicated by arrowscrossing said arbors in Fig. 1. The grain to be ground, being turnedinto hopper O, is fed from the bottom through spout a into the chamberformed by the contracted portion of easing J about the hub m of burr B,the ring (I retaining the same in saidchamber until it is fed throughthe opcningsin said hub m upon the worm G, which, rotating in theopposite direction from hub 'm, as shown by arrows, Fig. 5, draws orforces said grain between the burrs A and B. Said burrs revolvingrapidly in opposite directions quickly reduce the grain, as desired, toflour or meal, which falls from the edges of said burrs i nto thechamber formed by the casing J about them, and is thence dischargedthrough spout '5.

For grinding or reducing cane or corn in the ear, the cutters h it areattached to hub m. As the ears or cane pass between said cutters intosaid hub and are caught by the oppositely-rotating worm G,which forcesthem against the sharp edges of said cutters, they are thereby reducedsufficiently small for the burrs.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. The combination, in a grinding-mill, of the burr A, arbor H, the burrB, having hollowhub m, with lateral openings, arbor I, feed- Worm O,mounted upon arbor H and project ing into hollow hub m, and the casing J,having the contracted portion, substantially as and for the purposesset forth.

2. In a grinding-mill, the combination of the burr A and the burr B, thelatter having a central opening and a hub with openings communicatingwith the opening in its face, arbors I and II, worm O, secured to thelatter and projecting into the central opening in burr B, easing J,inclosing said burrs and hub m, and a. hopper, O, communicating withsaid casing J adjacent to the openings in hub or, substantially as andfor the purposes set forth.

3. In a grinding-mill, the combination of the burrs A and B, means forforcing the feed between said burrs, arbors II and I, provided withgears E E, and drivinggcar F, meshing with both of said gears E E,substantially as and for the purposes set forth.

at. In a grinding-mill, the combination of the burrs A and B, arbors Hand I, gears E E on said arbors, gear F, meshing with gears E E,master-wheel G, gear M, and shaft N, upon which said gears F and M aremounted, substantially as and for the purposes set forth.

5. In a grinding-mill, the combination of the oppositely-rotating arborsH I and burrs A and B, the burr B being formed with a central opening,and the hub on having lateral openings, feed-worm O, secured to thearbor H and projecting into the said central opening in burr B, casingJ, inclosing said burrs and hub, hopper 0, opening into said casing adjacent to hub m, regulating-slides p, and reciprocating agitator s,substantially as and for the purposes set forth.

6. In a grinding-mill, the combination of the yoke P, furnished withbearings D D, arbors II and I, mounted therein and provided with gears EE, burrs A B, gear F, meshing with gears E E, and easing J, inclosingsaid burrs and supported u poiryoke P,substantiall y as and for thepurposes set forth.

7. The combination, in a grimling-mill, of the burrs A and B, thelattenhaviugahollow hub, m, arbors H and I, worm O, by which the feed isforced between said burrs, casing J, dividing ring d, separating thespace within said casing about the hub m from that about said burrs,substantially as and for the purposes set forth.

In testimony that I claim the foregoing as my own I affix my signaturein presence of two witnesses.

HERBERT F. STONE.

\Vitnesses:

F. E. HARRIMAN, Fro. J. HARRIMAN.

